The Lunati rotating assemblies for Chevrolet LS1, LS2, and LS6 applications utilize a variety of bore and stroke combinations to yield the desired cubic inches. These kits feature Wiseco® flat top pistons forged from 2618 aluminum and CNC profiled. The rods are Lunati H-beam made from 4340 steel and measure 6.125 in. center-to-center. A Lunati Pro Series™ non-twist forged crankshaft made of 4340 aircraft quality steel weighing roughly 45 lbs. rounds out the kit.